Deneb

Deneb is the brightest star in the constellation of Cygnus, the Swan (Alpha Cygni), and is approx. 53.4 LY away. It also is the bottom star of the Northern Cross.

Cygnus - screenshot from StellariumÂ

Inhabitants

According to the Ra Material - which is channeled, - inhabitants of the Deneb system frequently visited Lemuria, some 53.000 years ago. They are said to be members of the Federation of Planets.

It is not clear whether these are the CygnusiansWendelle Stevens mentioned.
(In my opinion, they are not. From what I can get from the Ra Material, they would look more like a humanoid race of Vegan descent).

Alex Collier mentions that the inhabitants of Cygnus Alpha (=Deneb) are close to the Andromedans and the Tau Cetians. They would know a great deal about acoustic technology. Several of them would be present here on Earth today.
He also mentions that the dolphins on Earth are a cross between a mammal from the Sirian system and one from the Cygnus Alpha system.

More information:

Deneb is one of the most powerful radio sources in the sky.

Deneb may have played an important part in Egypt: one researcher claims that just as the three pyramids in Giza represent the three stars in the belt of Orion, so does the pyramid of Dendera represent Deneb. Dendera is the place where, in the temple of Hathor, the Dendera Zodiacs were found: a representation of the signs of the zodiac that are still in use today.